Detectives investigating the murder of 31-year-old Laura Marshall in Lurgan last April have released a 28-year-old man arrested in the Craigavon area.
The victim's body was discovered at her flat in Victoria Street, Lurgan, on April 3.
A PSNI detective said officers had found a "violent scene" inside the bathroom, which was destroyed and had a pool of blood on the floor.
Detective Chief Inspector Eamonn Corrigan said the suspect was interviewed yesterday and subsequently released, pending a report being submitted to the Public Prosecution Service.
A 36-year-old man was charged with Ms Marshall's murder in April.